barrier effect造句

• Air barrier effect
  空障效应
• This article takes hanging off and wide fluctuation of transmition velocity of adsl as example , then analysis centers on the discerte multiple tone and the principle of channel load assignation . from analysis above article points out the root of adsl being sensible of noise signal . at last , reserches effects that window function and barrier effect on frequency and adopts fft to work out the noise power of adsl
  本文以电信现在推出的adsl传输中链路经常掉线和传输速率经常大范围波动为例，重点分析了adsl所使用的dmt调制方式和注水算法分配信道载荷方式原理，由此指出adsl对噪声信号敏感的根源，在得到问题的根源之后，分析了窗函数和栅栏效应对频谱的影响，采用fft方法计算adsl线路的噪声功率谱，为adsl线路测试提供了可靠的理论依据。